Bran-duster



HALL.

Bran Duster.

Patented Nov. 1, 1859.

Inventar.' M. W!!

Witnesses:

WILLIAM I-IALL, OF ST. LOUIS, MISSOURI.

ERAN-DUSTER.

Speccation of Letters Patent No. 25,965, dated November 1, 1859.

To all whom 'it may concern:

Be it known that I, VILLIAM. HALL, of the city and county of St. Louisand St-ate of Missouri, have invented a new and Improved Bran-Duster;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawing,making part of this specication, in which- Figure l is a horizontalsection, through the said machine, Fig. 2 is a vertical section, andFigs. 3 and 1l are parts of the machine to be hereinafter explained.

My invention consists in constructing a machine for separating the flourfrom the bran, more perfectly than it has hitherto been, and with lesscost, by abstracting the flour all out of the bran, and with less wear'on the machine.

To enable others skilled in the arts to which my invention appertains tomake and use the same, I will proceed to describe the construction andoperation thereof. n

Similar letters of reference represent corresponding parts of thedifferent figures of the annexed drawing.

A A is the frame of the machine, across the bottom of which a cast ironbeam E is fixed, and into this beam a step is made to receive a journalboX C to support the vertical shaft D and across the upper part of theframe a similar beam F is fixed, into which a journal box I isintroduced to support the upper end of the shaft D. Upon this verticalshaft there are two flanges fixed (Z) which have arms L radiating fromtheir centers, eight in number, and upon the end of each of these arms,a brush is fixed as at P. To each of the brushes P a fan K is fixed, inthe position shown. Near the upper end of the shaft D a third flange isfixed which has four arms t, projecting from its center, and over thesearms, and near their center a rim of considerable dept-h is raised, asshown at M. This rim is cast upon the upper side of the arms, and so asto leave an open space between each of the said arms and the rim, asshown at II, Figs. l and 4. This vertical shaft D with its brushes andfans, `is incased in a cylinder composed of a series of ribs It, andwhich is lined with fine wire sheeting or gauze, as at a. The upper andlower ends of this cylinder, consist of semicircular segments, which arebolted together and into which the ribs R are secured. The upper end ofthis said cylinder is supported by means of a cast iron plate, shown atc, Figs. 2 and' 3, which has a flange, around its inside diameter, whichfits in the ring Q Q, composed of the two semicircular segments, abovedescribed. rIhe lower end of the cylinder, aforesaid rests upon a castiron plate B which has a flange upon its face to receive it, as shown atU U. In the periphery of the plate Q' cogs are cut, into which thepinion c meshes whereby the said cylinder is made to revolve.

IV is a plate made, of either wood or metal, and with the center boredout, just large enough to fit over the rim M, and so as to lap upon theplate C as at f Figs. 2 and 3, to which it is secured, thus closing thewhole upper end of the cylinder, save so much of it as is comprisedwithin the rim M. Over this rim, (which might be termed a nozzle,) apair of slides are placed, one, on each side of the shaft, which thuscloses the whole upper end of the cylinder and stops the access of airthereto whenever it may be desired so to do; these slides are shown at XX. The lower end of the cylinder is closed in a manner similar to theupper one, by means of the plate V and slide X.

The flange M with its arms t t is secured to the shaft D, so as to bringthe upper surface of the said arms, flush with the upper end of thebrushes, I), as shown Fig. 2. And over the arms t the head O O is fixed,with its scuppers N, so thatthe flour as it is fed through the hopperopening c c (Fig. 3) will fall upon the head O, and be caught by thescuppers N, so that the centrifugal force of the head O (which revolveswith the fans and brushes) will throw the flour against the inside ofthe gauze cylinder It, which is closely incased with a wooden casing S.

.I is the pulley to which power is applied to drive the shaft D and Y isthe pulley to which the power is applied to drive the cylinder It.

The object I propose to accomplish by means of this invention, is firstto throw the flour and bran against the inside surface of the cylinder Rso that it shall fall between the brushes and the cylinder, which objectI accomplish by the use of the head O O, with its tangent scuppers N,upon the top of the said cylinder, and second, the creation of a strongcurrent of air in the inside of the cylinder, so as to blow the flourthrough the screen as fast as the brushes free it, thus avoiding thenecessity of setting the brushes into absolute contact with the wirescreen, (as is now the case) which thus saves them from being worn out.This object I accomplish by means of the fans on the brushes and theopenings about the shaft I), whereby the current of air is created asaforesaid.

Now suppose the mill to be supplied with bran and flour, through thehole c c (Fig.k

3) it would fall upon the head O, O, and are thrown from thence againstthe inside of the cylinder, where it would be distributed by thebrushes, and the flour would be blown through the screen by the currentof air as aforesaid. The flour would then be WILLIAM HALL.

Witnesses AMos BRADDEN, M. RIOHMAN.

